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Proceedings Paper

Optical fiber gas sensor for remote detection of CH4 gas in underground mines
Author(s): Sanguo Li; Zhanxiong Wei; Zhifan Yin; Hong-Liang Cui
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Paper Abstract

An optical-fiber-based gas sensor for CH4 gas real-time monitoring has been developed and tested. A long-distance silica fiber link with compact single-path or multi-path gas cells has been employed in conjunction with a wavelength-tunable. InGaAsP DFB laser diode at 1.64μm (at the R(6) absorption peak of methane) to achieve highly sensitive remote interrogation of CH4 with potential application in the mining complexes and residential areas. By wavelength modulation with the DFB laser diode, multi-path gas cell and a self-design processing circuit, sensitivities of less than 1% of lower explosive limit (LEL) had been achieved in the laboratory.

Paper Details

Date Published: 9 May 2005
PDF: 8 pages
Proc. SPIE 5770, Advanced Sensor Technologies for Nondestructive Evaluation and Structural Health Monitoring, (9 May 2005); doi: 10.1117/12.599837
Show Author Affiliations
Sanguo Li, Stevens Institute of Technology (United States)
Zhanxiong Wei, Stevens Institute of Technology (United States)
Zhifan Yin, Stevens Institute of Technology (United States)
Hong-Liang Cui, Stevens Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5770:
Advanced Sensor Technologies for Nondestructive Evaluation and Structural Health Monitoring
Norbert Meyendorf; George Y. Baaklini; Bernd Michel, Editor(s)

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